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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | 85x 85x 85x 85x 85x 329x 329x 140x 329x 85x 20x 7x 17x 1x 16x 17x 17x 20x 85x 2x 1x 1x 2x 2x 2x 85x 12x 12x 12x 1x 1x 11x 4x 2x 9x 9x 9x 1x 8x 3x 3x 6x 5x 85x 303x 303x 12x 8x 303x | import { isArray } from '@vue/shared'
import { ComponentInternalInstance } from '../component'
import { callWithAsyncErrorHandling, ErrorCodes } from '../errorHandling'
import { assertCompatEnabled, DeprecationTypes } from './compatConfig'
interface EventRegistry {
[event: string]: Function[] | undefined
}
const eventRegistryMap = /*#__PURE__*/ new WeakMap<
ComponentInternalInstance,
EventRegistry
>()
export function getRegistry(
instance: ComponentInternalInstance
): EventRegistry {
let events = eventRegistryMap.get(instance)
if (!events) {
eventRegistryMap.set(instance, (events = Object.create(null)))
}
return events!
}
export function on(
instance: ComponentInternalInstance,
event: string | string[],
fn: Function
) {
if (isArray(event)) {
event.forEach(e => on(instance, e, fn))
} else {
if (event.startsWith('hook:')) {
assertCompatEnabled(
DeprecationTypes.INSTANCE_EVENT_HOOKS,
instance,
event
)
} else {
assertCompatEnabled(DeprecationTypes.INSTANCE_EVENT_EMITTER, instance)
}
const events = getRegistry(instance)
;(events[event] || (events[event] = [])).push(fn)
}
return instance.proxy
}
export function once(
instance: ComponentInternalInstance,
event: string,
fn: Function
) {
const wrapped = (...args: any[]) => {
off(instance, event, wrapped)
fn.call(instance.proxy, ...args)
}
wrapped.fn = fn
on(instance, event, wrapped)
return instance.proxy
}
export function off(
instance: ComponentInternalInstance,
event?: string | string[],
fn?: Function
) {
assertCompatEnabled(DeprecationTypes.INSTANCE_EVENT_EMITTER, instance)
const vm = instance.proxy
// all
if (!event) {
eventRegistryMap.set(instance, Object.create(null))
return vm
}
// array of events
if (isArray(event)) {
event.forEach(e => off(instance, e, fn))
return vm
}
// specific event
const events = getRegistry(instance)
const cbs = events[event!]
if (!cbs) {
return vm
}
if (!fn) {
events[event!] = undefined
return vm
}
events[event!] = cbs.filter(cb => !(cb === fn || (cb as any).fn === fn))
return vm
}
export function emit(
instance: ComponentInternalInstance,
event: string,
args: any[]
) {
const cbs = getRegistry(instance)[event]
if (cbs) {
callWithAsyncErrorHandling(
cbs.map(cb => cb.bind(instance.proxy)),
instance,
ErrorCodes.COMPONENT_EVENT_HANDLER,
args
)
}
return instance.proxy
}
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